Class LinuxCounter
# a Linux counter has several attributes:
#
# 1. How to read it from /proc
# 2. Whether we want to treat it as GAUGE, DERIVE, COUNTER or ABSOLUTE in RRDTool
# 3. Other RRDTool attributes
# 4. A name
# 5. Units

# when we define a counter, we want to give it a name, create an entry in an RRDCreate object for it, etc.
